Dr. Cummins publishes an article describing a man who abused alcohol for 25 years before becoming abstinent after having a religious conversion experience. This article illustrates a ____

Phillip has repeated and intense sexual urges to rub his genitals against women in crowded subways. He is probably suffering from:

A. voyeurism. B. exhibitionism. C. sexual sadism. D. frotteuristic disorder

Despite its weaknesses, the cross-sectional design remains popular with researchers because it

a. is quickly and easily applied. b. reveals details about individual development while the child matures. c. requires patience while data are collected for years. d. gives clearly interpretable results when cohort effects are especially strong.